Improvement in staffing devices for millstones



D. LEIB.

STAFFING-DEVICES FOR MILL-STONES.

No. 173,550. Patented Feb.15,1876.

Jyz-f "Jim, PHOTD LITHQGRIPHER, WASHINGTON, D, l)

UNITE STATES PATENT OFFICE.

DAVID LEIB, OF RICH HILL, onto.

IMPROVEM ENT IN STAFFING DEVICES FOR MILLSTONES.

Specification forming part of Letters Patent No. [73,550, dated February15, 1876; application filed J uly 17, 1875.

To all whomit may concern: I

Be it known that I, DAVID LEIB, of Rich Hill, in the county of KnoxandState ofOhio,

' have invented a new and Improved Staffing Device for Millstones, ofwhich the following is a specification:

In the accompanying drawing, Figure 1 represents a top view of myimproved millstone-staffing attachment; and Figs. 2 and 3,

' vertical central sections of the same, showing runner and bedandprovided with horizontal spring-stand ards, that carry at their mortisedfront ends the bearers of the red-staff, that is adjusted by set-screwsto the surface of the stones.

A in the drawing represents the supportingp'late of my improvedmillstone-stafiing attachment, which plate is provided with handles atopposite ends, to place the device readily into position, onthe stones.

Plate A has a central perforation, a, that fits on the spindle B andholes b, at equal distance therefrom, that correspond to guide-pins b ofthe driver (J, keyed to spindle B.

When the staffing device is placed on the bed-stone the supporting-plateis secured on the threaded pins by fastening thumb-nuts d, and revolvedby the turning of the spindle. When the device is used for stalling therunner the plate A isattached to an intermediate shell or cylindricalpart,D,by means of guidepins b, that enter holes in the plate A. Thepart D fits loosely into a recess-in the runner, and is revolved withits attached parts by taking hold of the handles.

Plate A carries parallel horizontal springstandards E, that are fastenedat one end and extended with their free ends beyond the circumference ofthe supporting-plate, carrying vertically recessed or mortisedextensions 0, in which the bearing-standards f of the redstaff F slide,being adjusted to any height by set-screws f. When the red-staff isfastened by the thumb-screws f, the final adjustment is made byset-screws of the spring-standards, that secure the rigid position ofthe staff. When the red-staff rests level on the face of the stone, asmall thin piece of paper is placed under each end, so as not to allowthe statfto mark any part of the face of the stone before it is properlyadjusted by the screws of the spring-standards. The higher parts arethen marked off and dressed, which is repeated until the staff colorsthe entire face of the stone. When both bed stone and runner arestafl'ed perfectly true, the runner is placed back on the spindle, beingset true" thereon, and then runin perfect tram.

Having thus described my invention, I claim as new and desire to secureby Letters Patent 1. A staffing device for millstoncs, composed ofsupporting-plate, with parallel adjustable spring-stamlards, carryinglateral markingstaff attached thereto, substantially in the manner andfor the purpose set forth.

2. The combination of the supporting-plate, having guide-holesequidistant from the center, with the threaded guide-pins of the runneror bed-stone attachment, and with binding thumb-screws, to attach devicefor staffing either-runner or bed-stone, substantially as described.

DAVID LEIB.

Witnesses:

DEMos BRICKER, W. L. MILLs.

